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// |
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// NNThread.m -Not Nextstep Thread? |
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// Nigel's Nice Thread? |
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// |
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// Revision 1.3, Tuesday Oct 8 2002 |
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// |
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// Created by Nigel Pearson on Tue Nov 28 2000. |
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// Public Domain. No rights reserved. |
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// |
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|
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#import "NNThread.h" |
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#import <objc/objc-runtime.h> // For objc_msgSend() prototype |
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|
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@implementation NNThread |
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|
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// Define the wrapper first so that init knows about it without having to put it in the .h |
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|
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#ifdef USE_NSTHREAD |
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- (void) wrapper |
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{ |
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machThread = mach_thread_self(); |
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|
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if ( object == nil || sel == (SEL) nil || suspended ) |
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thread_suspend (machThread); // Suspend myself |
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|
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if ( allocPool ) |
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pool = [[NSAutoreleasePool alloc] init]; |
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|
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// [object sel] caused "cannot find method" warnings, so I do it a non-obvious way: |
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objc_msgSend (object, sel); |
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|
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completed = YES; |
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|
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if ( allocPool ) |
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[pool release]; |
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} |
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#endif |
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|
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#ifdef USE_PTHREAD |
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void * |
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pthreadWrapper (void *arg) |
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{ |
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struct pthreadArgs *args = arg; |
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|
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if ( args -> allocPool ) |
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args -> pool = [[NSAutoreleasePool alloc] init]; |
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|
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objc_msgSend (*(args->object), *(args->sel)); |
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|
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*(args->completed) = YES; |
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|
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if ( args -> allocPool ) |
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[args -> pool release]; |
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|
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return NULL; |
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} |
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|
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- (BOOL) wrapper |
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{ |
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int error; |
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|
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pthreadArgs.object = &object; |
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pthreadArgs.sel = &sel; |
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pthreadArgs.allocPool = allocPool; |
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pthreadArgs.completed = &completed; |
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pthreadArgs.pool = nil; |
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|
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if ( object == nil || sel == (SEL) nil || suspended ) |
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error = pthread_create_suspended_np (&pThread, NULL, &pthreadWrapper, &pthreadArgs); |
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else |
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error = pthread_create (&pThread, NULL, &pthreadWrapper, &pthreadArgs); |
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|
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if ( error ) |
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NSLog(@"%s - pthread_create failed"); |
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else |
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machThread = pthread_mach_thread_np (pThread); |
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|
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return ! error; |
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} |
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#endif |
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|
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- (NNThread *) initSuspended: (BOOL) startSuspended |
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withAutoreleasePool: (BOOL) allocatePool |
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{ |
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self = [super init]; |
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|
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allocPool = allocatePool; |
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completed = NO; |
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suspended = startSuspended; |
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object = nil; |
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sel = (SEL) nil; |
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|
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#ifdef USE_NSTHREAD |
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[NSThread detachNewThreadSelector:@selector(wrapper) |
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toTarget:self |
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withObject:nil]; |
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#endif |
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|
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#ifdef USE_PTHREAD |
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if ( ! [self wrapper] ) // Wrapper does the thread creation |
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{ |
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NSLog(@"%s - pthread wrapper failed", __PRETTY_FUNCTION__); |
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return nil; |
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} |
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#endif |
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|
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return self; |
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} |
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|
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- (NNThread *) init |
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{ |
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return [self initSuspended: YES withAutoreleasePool: NO]; |
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} |
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|
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- (NNThread *) initWithAutoReleasePool |
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{ |
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return [self initSuspended: YES withAutoreleasePool: YES]; |
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} |
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|
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- (BOOL) completed |
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{ |
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return completed; |
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} |
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|
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- (void) perform: (SEL)action of: (id)receiver |
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{ |
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object = receiver, sel = action; |
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} |
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|
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- (void) resume |
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{ |
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if ( suspended ) |
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[self start]; |
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else |
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NSLog (@"%s - thread not suspended", __PRETTY_FUNCTION__); |
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} |
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|
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- (BOOL) start |
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{ |
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kern_return_t error; |
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|
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if ( object == nil || sel == (SEL) nil ) |
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{ |
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NSLog (@"%s - cannot start thread, object or selector invalid", __PRETTY_FUNCTION__); |
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return NO; |
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} |
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if ( ( error = thread_resume (machThread) ) != KERN_SUCCESS ) |
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NSLog (@"%s - thread_resume() failed, returned %d", __PRETTY_FUNCTION__, error); |
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suspended = NO; |
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return YES; |
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} |
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|
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- (void) suspend |
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{ |
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if ( ! suspended ) |
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{ |
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kern_return_t error; |
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|
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if ( ( error = thread_suspend (machThread) ) != KERN_SUCCESS ) |
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NSLog (@"%s - thread_resume() failed, returned %d", __PRETTY_FUNCTION__, error); |
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suspended = YES; |
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} |
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} |
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|
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- (void) terminate |
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{ |
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kern_return_t error; |
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|
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if ( ( error = thread_terminate (machThread) ) != KERN_SUCCESS ) |
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NSLog (@"%s - thread_terminate() failed, returned %d", __PRETTY_FUNCTION__, error); |
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} |
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|
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@end |
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|
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@implementation NNTimer |
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|
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- (NNTimer *) init |
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{ |
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self = [super init]; |
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repeating = YES; |
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return self; |
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} |
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|
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- (void) changeIntervalTo: (int)number |
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units: (NNTimeUnits)units |
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{ |
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switch ( units ) |
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{ |
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case NNnanoSeconds: |
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delay.tv_nsec = number; |
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delay.tv_sec = 0; |
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break; |
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case NNmicroSeconds: |
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delay.tv_nsec = number * 1000; |
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delay.tv_sec = 0; |
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break; |
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case NNmilliSeconds: |
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delay.tv_nsec = number * 1000000; |
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delay.tv_sec = 0; |
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break; |
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case NNseconds: |
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delay.tv_nsec = 0; |
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delay.tv_sec = number; |
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break; |
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default: |
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NSLog (@"%s illegal units(%d)", __PRETTY_FUNCTION__, units); |
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} |
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} |
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|
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- (void) invalidate |
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{ |
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repeating = NO; |
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} |
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|
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- (void) timerLoop |
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{ |
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// For some strange reason, Mac OS X does not have this prototype |
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extern int nanosleep (const struct timespec *rqtp, struct timespec *rmtp); |
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|
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while ( repeating ) |
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{ |
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nanosleep(&delay, NULL); |
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completed = NO; |
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// This caused a few warnings: |
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// [timerObject timerSel]; |
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// so I do it a non-obvious way: |
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objc_msgSend (timerObject, timerSel); |
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completed = YES; |
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} |
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} |
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|
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- (void) perform: (SEL)action of: (id)receiver |
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after: (int)number units: (NNTimeUnits)units |
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{ |
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object = self, sel = @selector(timerLoop), |
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timerObject = receiver, timerSel = action, repeating = NO; |
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[self changeIntervalTo: number units: units]; |
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} |
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|
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- (void) repeat: (SEL)action of: (id)receiver |
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every: (int)number units: (NNTimeUnits)units |
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{ |
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object = self, sel = @selector(timerLoop), |
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timerObject = receiver, timerSel = action, repeating = YES; |
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[self changeIntervalTo: number units: units]; |
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} |
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|
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@end |
